Iowa DNR
ADBNet

Water Quality Assessments

Impaired Waters List

Ralston Creek IA 02-IOW-1899

from mouth (S15 T79N R6W Johnson Co.) to confluence with unnamed tributary in S11 T79N R6W Johnson Co.

Assessments
Cycle
IR Category
5
Pending
5
5
5
5
Legacy Assessments
2014
2012
2010
2008
2006
2004
Details
Type
River
Segment ID
1899
Segment Size
1.83 Miles
07080209
Legacy ADBCode
IA 02-IOW-0155_1
Designated Uses
  • Class A1 P
  • Class BWW1 P
  • General Use
Segment Memos 1 memos
Prior to the 2008 IR cycle, this segment was classified only for general uses. Due to changes in Iowa’s surface water classification approved by U.S. EPA in 2008, this segment now has presumptive Class A1 primary contact recreation and Class BWW1 warmwater aquatic life designated uses. According to the Iowa Water Quality Standards, all perennial streams and all intermittent streams with perennial pools that are not specifically listed in the Iowa surface water classification are designated as Class A1 and Class BWW1 waters.
6/16/2020
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